KZScott
Needs a life
high on speed
Posts: 7235
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posted May 24, 2008 09:17 AM
piston prep/mod for nitrous
does anyone have some pics of pistons they have modified for nitrous and or high compression? Karl, VH, KCadby, DM, JC? (anyone i havention mentioned too!) I know that the sharp edges must be taken off to prevent hot spots, and i have seen pics where the thin edge on the intake valve pocket was removed.
I want to make my new JE's extra safe for when i put on a dry kit 
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01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
  
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Gixx1300R
Expert Class
Posts: 218
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posted May 24, 2008 06:42 PM
Get Nitrous pistons (thicker ring landings) and Ceramic coat the piston domes,dry film coat the skirts
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TRNorBRN6001
Needs a job
Posts: 2021
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posted May 24, 2008 07:40 PM
Give JC a call, Sunday after 1pm, he should be at his hobby shop. He can help you out a bit on that and recommend ring gap for your application. I would think those pistons will work just fine, most will handle a 100 shot easy and some crazy people have run 150-180 HP shot...............................................but its all set-up and application. If you ever get ARP to cough up some good head bolts for a 12, please let the rest of us know.
Just my idiots two cents.
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TFA 200MPH CLUB MEMBER!
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KZScott
Needs a life
high on speed
Posts: 7235
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posted May 25, 2008 11:01 AM
kinda late for nitrous pistons, plus the ones i have will be plenty tough enough as guys have sprayed more on stockers than i plan on running on the JEs....
pm sent Gary. want to check to see if i have the right number
thx
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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APE Jay
Novice Class
Posts: 59
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posted May 25, 2008 02:06 PM
quote:
G If you ever get ARP to cough up some good head bolts for a 12, please let the rest of us know.
http://zxzone.com/studs.html (copy and paste)
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http://www.aperaceparts.com/
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KZScott
Needs a life
high on speed
Posts: 7235
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posted May 25, 2008 06:21 PM
 Edited By: KZScott on 25 May 2008 19:27
assist for Jay:
http://zxzone.com/studs.html
this is what im dealing with for pistons. 86mm 13.5:1 CR
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01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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aliveagain
Needs a life
Posts: 5033
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posted May 25, 2008 07:50 PM
quote:
quote:
G If you ever get ARP to cough up some good head bolts for a 12, please let the rest of us know.
http://zxzone.com/studs.html (copy and paste)
I have those and had to ream out the billet big block to allow them to fit . Don't know if the stock cylinders accept them.I never found out what to torque them to but was using 80ft/lbs.
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I wondered why the baseball kept getting bigger. Then it hit me.
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kcadby
Pro
Posts: 1733
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posted May 25, 2008 08:23 PM
Don't have pictures in this computer...
You don't want any sharp/thin edges or corners like around the valve reliefs...
Just round the edges a bit...
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www.kcadby.org
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sleeperbusa
Novice Class
Posts: 73
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posted May 26, 2008 06:19 AM
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2008 Hayabusa.
64", stock clutch, stock gears, foot shifting,1441cc, 8.98 at 157mph at 260 pounds. Holdin it down for the big fellas..
2013 ZX14R.....to be continued.
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TRNorBRN6001
Needs a job
Posts: 2021
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posted May 26, 2008 11:08 AM
Thank you much Jay, your awesome. I'll be sending you a Busa crank on Tuesday to whitle down a litttle. Just curious what the torque spec is on those big 1/2" Busa Studds as well. I currently have the old Heavy Duty MotorHead bolts.
Forgot how perty them pistons look new! Kind of hurts not to put those shiney things on the mantle.
____________
TFA 200MPH CLUB MEMBER!
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KZScott
Needs a life
high on speed
Posts: 7235
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posted May 26, 2008 01:44 PM
thx guys!
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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VincentHill
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Posts: 6520
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posted May 27, 2008 09:52 AM
I have CP Pistons that are Almost flat on top. Looking at the CP vs the JE I see that the CP has 2 more Oil Holes more Machinning under the Piston, Longer Skirts with Thicker webbing in the corners at the same weight for the style of Piston. Mine is 0.060 thicker crown. I did very little to the pistons with an Abrasive Rubber wheel on the edges. What convenced me to use CP was the fact that my JE like the JE used in the Bear ZX12R engine the valve pockets were very slightly off center. Not so with the CP> The other reason is when I was Speaking to Cossworth and Mahle (2 Highly respected Piston Makers for Porsche and other Race Engines) The both mentioned CP but never JE
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Made History @ Daytona and still one fast old man!!
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aliveagain
Needs a life
Posts: 5033
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posted May 27, 2008 10:11 AM
quote:
Intrigued by all those grooves above the first ring landing.Clue me in?
____________
I wondered why the baseball kept getting bigger. Then it hit me.
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APE Jay
Novice Class
Posts: 59
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posted May 27, 2008 09:23 PM
quote:
Thank you much Jay, your awesome. I'll be sending you a Busa crank on Tuesday to whitle down a litttle. Just curious what the torque spec is on those big 1/2" Busa Studds as well. I currently have the old Heavy Duty MotorHead bolts.
Forgot how perty them pistons look new! Kind of hurts not to put those shiney things on the mantle.
You should be fine with 80 lbs. Some people tell us they pull them down to 100, but I feel that can pull the main bearing bores out of round.
Jay
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http://www.aperaceparts.com/
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VincentHill
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Posts: 6520
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posted May 28, 2008 03:10 AM
AA, There is an actual name for them but they are for trapping compression like an extra seal. The CP Pistons have 1 groove but it is on the Second Ring Land.
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Made History @ Daytona and still one fast old man!!
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aliveagain
Needs a life
Posts: 5033
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posted May 28, 2008 03:25 AM
What ,like a vapor barrier?Can they be used for nitrous?
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I wondered why the baseball kept getting bigger. Then it hit me.
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KZScott
Needs a life
high on speed
Posts: 7235
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posted June 14, 2008 07:56 AM
My JE's also have one groove, between the top rings 
this is what i ended up doing. removed that thin wall by the IN valve pocket with my dremmel, and rounded all edged and sharp corners with 600 grit sand paper(by hand)
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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